Corrections and refunds
CP21C
Your requested change was made — balance zero
What this notice is
A CP21C confirms the IRS made the changes you requested to your return, and the account for that year now sits at zero — nothing owed, nothing refunded. It's a receipt for a completed correction.
What the IRS is generally saying
Does this type carry a deadline?
Nothing is due and nothing is coming. The only reason to act is a mismatch: a change you didn't request, or a zero where you expected a refund.
What people usually gather
- The notice and your adjustment request, side by side
- Your copy of the return, updated for your records
- Nothing further if they match
What a licensed professional handles
- Reconciling the IRS's version of the change against what was requested
- Reopening the correction if the zero should have been a refund
- Transcript checks to confirm the account is truly settled
- Investigating unrequested changes
This explanation of the notice type is compiled from the IRS’s own published description (retrieved 2026-08-21): irs.gov/individuals/understanding-your-cp21c-notice. It describes the notice type in general — not your letter, and not your situation.
The next step
Holding a CP21C and want it handled?
Fifteen quiet minutes with a licensed professional usually settles what a letter means and what the sensible next step is. No pressure, no scare tactics, and nothing sensitive needed to start the conversation.
Request a consultation